Creating Archive ....Done
md5sum is: 2853e1b59fb73b6255d25664853dd6cd
Waiting for load to go down to continue
Waiting for load to go down to continue
Waiting for load to go down to continue
....................
etc

If upcp starts using more than a certain amount of resources, it will pause what it is doing and wait for the systems load to go down. That way upcp does not cripple all the services running on your service.